kachayev

Channels Are Not Enough

... or Why Pipelining Is Not That Easy

Golang Concurrency Patterns for brave and smart.

By @kachayev

Intro

jashkenas

Spurred by recent events (https://news.ycombinator.com/item?id=8244700), this is a quick set of jotted-down thoughts about the state of "Semantic" Versioning, and why we should be fighting the good fight against it.

For a long time in the history of software, version numbers indicated the relative progress and change in a given piece of software. A major release (1.x.x) was major, a minor release (x.1.x) was minor, and a patch release was just a small patch. You could evaluate a given piece of software by name + version, and get a feeling for how far away version 2.0.1 was from version 2.8.0.

But Semantic Versioning (henceforth, SemVer), as specified at http://semver.org/, changes this to prioritize a mechanistic understanding of a codebase over a human one. Any "breaking" change to the software must be accompanied with a new major version number. It's alright for robots, but bad for us.

SemVer tries to compress a huge amount of information — the nature of the change, the percentage of users that wil

mapmeld

Getting Started

I recently made my first map with MapBox's new WebGL+JavaScript API. There aren't many examples of how to do this yet, even on MapBox's API page, so I'll document my own experience here.

The Van Gogh Map

My map is made of several textures taken from Van Gogh paintings. The long-term goal is to allow a user to select which artworks they want to take textures from, but for now there is just one setting.

Why are we changing maps?

kjseefried

from bitstring import ConstBitArray, BitStream  

# Opening from a file means that it won't be all read into memory
s = ConstBitArray(filename='test.ts')
outfile = open('test_nonull.ts', 'wb')

# Cut the stream into 188 byte packets
for packet in s.cut(188*8):
    # Take a 13 bit slice and interpret as an unsigned integer
    PID = packet[11:24].uint

staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

---

miguelgrinberg

import argparse
import re
from multiprocessing.pool import ThreadPool as Pool
import requests
import bs4

root_url = 'http://pyvideo.org'
index_url = root_url + '/category/50/pycon-us-2014'

vedant

/* Vedant Misra (vedantmisra.com) (github.com/vedant)
 *
 * Script for exporting Google Keep note files. 
 *
 * This does not handle attachments or checklists, only note files. Downloads 
 * each note to a .txt file named for the note's title. 
 * 
 * To use this, go to https://drive.google.com/keep/ and wait for the page to 
 * fully load all of your saved notes; scroll to the bottom to confirm they're 
 * loaded. Then paste the below in your URI bar, go to the start of the line, 

geohacker

Outline

1. What is Georeferencing? And Why?
2. Ground Control Points.
3. Tools. 1. GIMP 2. Inkscape 3. QGIS
4. Raster data.
5. Process

buck3000

370  git clone https://github.com/buck3000/CLI-Obstacle-Course.git
  371  cd CLI-Obstacle-Course/
  372  ls
  373  ls
  374  mv images app/assets
  375  ls
  376  cd app
  377  ls
  378  cd assets/
  379  ls

nsonnad

import csv
import itertools

f = csv.reader(open('file.csv'))

for row in itertools.islice(f, 0, 50):
  print row